ALL-SOLID-STATE BATTERY

An all-solid-state battery includes: a solid electrolyte layer; a first internal electrode layer and a second internal electrode layer opposite to each other with the solid electrolyte layer interposed therebetween; a first external electrode connected with the first internal electrode layer; a second external electrode connected with the second internal electrode layer; a first margin layer disposed between the first internal electrode layer and the second external electrode; and a second margin layer disposed between the second internal electrode layer and the first external electrode. An active region in which the first internal electrode layer and the second internal electrode layer overlap, the first margin layer, and the second margin layer satisfy 0.05≤(a+c)/b≤0.1, in which a is a length of the first margin layer, b is a length of the active region, and c is a length of the second margin layer.